JP2012201341A - Head protective airbag system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head protective airbag system that prevents an edge side of an airbag from moving toward the center in a longitudinal direction, when the airbag is completely expanded, with a simple structure.SOLUTION: In a head protective airbag system, an airbag 21 is folded and housed on an upper edge side of a window of a vehicle by mounting, on a mounting seat on a car body side, a plurality of mounting units 37 provided in parallel in a longitudinal direction. A mounting part disposed at the rear end is used as a pull-up mounting part 37F which is disposed on an upper side of a terminal-side expansion part 28, and applies an upward tensile force so as to prevent the terminal-side expansion part 28 from moving forward when expansion is completed. When the terminal-side expansion part 28 is inflated flatly and disposed in a non-expanded state while disposing the mounting parts 37 excluding the mounting part 37F at arrangement positions of mounting seats on an inflation mounting line LM which is formed by flatly inflating the mounting parts while connecting the corresponding mounting seats 3, the mounting part 37F is disposed below by a differential dimension DL from an arrangement position 3FP of a mounting seat 3F for the mounting part 37F on the inflation mounting line LM.

Description

  The present invention is a head mounted on a vehicle for deploying and inflating an airbag that can protect the head of an occupant downward from the upper edge side of the window so as to cover the inside of the vehicle window in the event of a side collision of the vehicle. The present invention relates to a part protection airbag device.

  Conventionally, as a head protection airbag device, when an inflating gas flows in, the airbag is configured to expand and inflate downward from the upper edge side of the window so as to cover the inside of the vehicle window (inside the room). (For example, refer to Patent Documents 1 and 2). This airbag is folded so that the lower edge side of the flat deployed state approaches the upper edge side, and a plurality of mounting portions arranged in parallel in the front-rear direction are attached to the vehicle body side, and the upper edge side of the window inside the vehicle It was stored in. And if an airbag expand | swells, the tension | tensile_strength which is going to shrink in the front-back direction will generate | occur | produce on the lower edge side of an airbag, and if the dimension of the front-back direction narrows, the area which receives a passenger | crew will become narrow.

  In addition, on the front end side of the airbag, in order to improve the restraining performance that restrains the occupant on the inside of the vehicle, it is connected to the front pillar side so as to generate a longitudinal tension on the lower edge side of the airbag Tension exhibiting connecting parts such as belts and tethers were arranged.

JP-A-2005-350019 JP 2003-48504 A

  However, in the conventional airbag, on the rear edge side where the connecting belt or the like is not provided, it is inevitable that the airbag moves to the center side in the front-rear direction of the airbag, that is, forward when the inflation is completed. Therefore, in anticipation of the movement, the volume of the inflating part will be expanded to cope with the area of the inflating part extending to the trailing edge side, and an inflator that supplies inflation gas needs to have a large output. It was.

  As a countermeasure, it is conceivable to connect a connecting material such as a connecting belt extending in the front-rear direction to both front and rear ends of the airbag. However, in the structure in which connecting members are provided at both the front and rear ends of such an airbag, the lower edge side of the airbag including the connecting members before and after the completion of the inflation, from the entire length connecting the attachment portions of the airbag to the vehicle body. Because the length of the front and rear of the airbag is reduced, when the airbag is folded and stored so that the lower edge of the airbag approaches the upper edge, the length is insufficient, and the airbag is placed along the periphery of the upper edge of the window. Can not be stored.

  This invention solves the above-mentioned subject, and provides the head protection airbag apparatus which can suppress that the edge side of an airbag moves to the center side of the front-back direction at the time of completion of inflation with a simple structure. With the goal.

<Explanation of Claim 1>
In the head protection airbag device according to the present invention, the airbag is
At the time of inflow of the expansion gas, so as to cover the vehicle interior of the vehicle window, and expand and expand downward from the upper edge side of the window,
Fold the lower edge side of the flat deployed state closer to the upper edge side, and attach a plurality of mounting parts arranged side by side in the front-rear direction to the corresponding mounting seats on the vehicle body side. Stored on the upper edge,
A head constructed by disposing an inflatable end side inflating portion at the end in the front-rear direction so as to protect the passenger's head so that the inflating gas flows and separates the vehicle inner wall portion and the vehicle outer wall portion. Part protection airbag device,
Among the plurality of mounting portions, the mounting portion disposed on the end side of the airbag is,
While being disposed on the upper side of the end side expansion portion,
An upward tensile force is applied to the edge side of the rear inflatable portion so that movement of the end inflatable portion toward the center in the front-rear direction of the airbag at the time of completion of inflation in the vehicle mounted state can be suppressed. As a lifting attachment,
A mounting line connecting the mounting seats, the mounting part excluding the lifting mounting part with respect to a deployment mounting line developed on a vertical plane along the front-rear direction while maintaining a height. , When the end-side expansion portion is deployed in a non-inflated flat state while being arranged at the corresponding placement positions of the mounting seats on the deployment attachment line,
In order to be disposed below the mounting position of the mounting seat for mounting the lifting mounting portion on the deployment mounting line,
It is characterized by being arranged.

  In the head protection airbag device according to the present invention, the attachment portion excluding the attachment portion for pulling up in the airbag is arranged at the arrangement position of each corresponding attachment seat on the deployment attachment line, and the end-side inflating portion is not attached. When the airbag is installed flatly inflated and placed, the mounting part for lifting the airbag causes a drop size from the position of the mounting seat for mounting the mounting part for lifting on the deployment mounting line. Is arranged. In other words, since the lifting attachments are arranged below the corresponding mounting seats on the deployment attachment line by the drop size, if the airbag is completely inflated with the vehicle mounted, the pulling up On the other hand, the mounting part for the head causes an upward tensile force to act on the edge side of the end side inflating part by the head size. As a result, the airbag has its end-side inflated portion pulled upward so that the center mounting portion of the airbag adjacent to the pull-up mounting portion is the center of rotation. The movement of the airbag toward the center side is suppressed.

  Such an action causes the pull-up mounting portion on the end side of the airbag to be less than the drop dimension from the position of the corresponding mounting seat on the deployment mounting line formed by connecting the mounting seats on the vehicle body side. Since it can be achieved simply by disposing it below, it can be simply configured.

  In the head protection airbag device according to the present invention, the linear distance between the pull-up mounting portion and the mounting portion in the central side direction of the airbag adjacent to the pull-up mounting portion corresponds to the deployment mounting line. It becomes longer than the separation distance (mounting span) between the mounting seats, because the lifting mounting portion is disposed lower. Therefore, when the airbag is mounted on a vehicle by folding the lower edge side of the airbag closer to the upper edge side, the lifting attachment portion and the attachment portion in the center side direction of the airbag adjacent to the lifting attachment portion In the meantime, there is room to generate some slack. This margin can absorb the shrinkage of the edge of the end side inflatable portion toward the center of the airbag when the end of the inflation is completed. Also, it is possible to suppress the movement of the edge side of the airbag toward the center side in the front-rear direction when the inflation is completed.

  Therefore, in the head protection airbag device according to the present invention, the end side of the airbag can be prevented from moving toward the center in the front-rear direction when the inflation is completed with a simple structure.

  In particular, in the head protection airbag device of the present invention, a connection material such as a connection belt or a tether that attaches a tip to a body-side portion that is separated from the airbag in the front-rear direction is separately provided on the edge of the airbag. Without providing, it is possible to prevent shrinkage of the area of the end side expansion portion. Therefore, the head protection airbag device of the present invention can be suitably mounted on a vehicle having no space on the body side on the edge side of the airbag.

  In addition, the effect of this invention cannot be achieved if the attachment part by the side of the end of an airbag is simply arrange | positioned rather than the attachment part by the side of the center of an adjacent airbag. For example, in the airbag of Patent Document 2, the rear end side mounting portion is disposed below the central mounting portion of the front airbag. However, in this way, each mounting portion of the airbag is simply associated with the deployment mounting line formed by connecting the mounting seats on the vehicle body side, and the mounting portion on the rear end side is arranged below the mounting portion on the front side. Even if it is done, the effect | action and effect which produce a big upward tensile force like this invention cannot be achieved.

  The pull-up mounting portion of the present invention is a mounting line connecting the mounting seats, and the airbag is based on the deployment mounting line deployed on the vertical plane along the front-rear direction while maintaining the height. When the mounting part excluding the lifting mounting part is aligned with the position of the corresponding mounting seat on the deployment mounting line, the lifting mounting part on the deployment mounting line is supported. The above-described effects can be achieved by disposing the mounting seat at a position lower than the mounting position of the mounting seat. That is, it is important to arrange the pull-up mounting portions below the corresponding mounting seats. Therefore, in order to increase the action of pulling up the end side of the airbag, the distance (head size) to be lowered below the position of the corresponding mounting seat can be increased within a range in which the area of the end side inflating portion can be secured. Good.

<Explanation of Claim 2>
In the head protecting airbag device according to the present invention, the airbag is
In a state where the end-side inflatable portion is deployed in a non-inflated flat state, compared to the upper edge portion in which the attachment portion adjacent in the center side direction of the airbag of the pull-up attachment portion is disposed, In order to offset the upper edge portion where the pulling attachment portion is disposed downward,
On the upper edge of the end side inflating portion of the airbag, a concave portion is provided to be lowered,
On the upper edge side of the peripheral edge of the recess, the lifting attachment is disposed,
It is desirable to configure.

  Such a configuration forms an airbag if the pulling attachment portion is arranged by shifting downward by the drop size so as to provide a step from the attachment portion adjacent in the center side direction of the airbag. Thus, the airbag apparatus can be configured more easily.

<Explanation of Claim 3>
In the head protection airbag device according to the present invention, the pull-up attachment portion of the airbag has the non-inflated flat deployment of the end portion side of the airbag including the end-side inflating portion. You may arrange | position so that it may overlap with an end side expansion part.

  In such a configuration, even if the pull-up mounting portion is lowered so as to approach the lower edge side of the end side inflating portion of the airbag, the vicinity of the mounting seat of the pulling mounting portion can be covered with the inflated portion, and the roof The occupant head entering the side can be protected from the vicinity of the mounting seat, and the width dimension in the vertical direction for receiving the occupant head can be secured large so as to extend upward.

<Explanation of Claim 4>
In the head protection airbag device according to the present invention, the airbag is arranged between the end-side inflating portion and the pull-up mounting portion disposed above the end-side inflating portion. If it is configured by surrounding a periphery and arranging a peripheral portion as a non-expandable portion that does not allow the inflation gas to flow in,
The peripheral edge portion may be formed by providing a contraction portion in which the vertical dimension is reduced and coupled immediately below the pulling attachment portion.

  In such a configuration, by providing the contraction portion, the pulling attachment portion can be easily lowered so as to approach the end-side expansion portion. That is, for example, at the beginning of manufacturing the airbag, first, the airbag is manufactured by arranging each mounting portion so as to correspond to the layout position of each mounting seat on the mounting line, and then immediately below the lifting mounting portion. If the cut part is provided at the peripheral part and the peripheral parts of the cut part are connected to each other, or a tack is provided, and a contraction part is provided, it is pulled up from the predetermined mounting seat position to the lowered position by the drop size. An air bag can be easily manufactured by disposing the mounting portion for use.

  Furthermore, in such a configuration, the arrangement position of the vertical lifting attachment portion can be easily adjusted by increasing / decreasing the vertical shrinkage allowance by the contraction portion, and the upward expansion toward the edge side of the end-side expansion portion Can be easily adjusted.

It is the front view seen from the vehicle inner side of the head protection airbag device of a 1st embodiment concerning the present invention. It is a figure which shows the state which unfolded and flattened the airbag used for the head protection airbag apparatus of 1st Embodiment. It is sectional drawing of the airbag of 1st Embodiment, and is a figure corresponding to the III-III site | part of FIG. It is a figure explaining the process of folding the airbag of 1st Embodiment. It is a front view which shows the time of operation | movement with the head protection airbag apparatus of 1st Embodiment, and a comparative example. It is the front view seen from the vehicle inner side of the head protection airbag apparatus of 2nd Embodiment. It is a figure which shows the state which unfolded and flattened the airbag used for the head protection airbag apparatus of 2nd Embodiment. It is a schematic sectional drawing of the airbag of 2nd Embodiment, and respond | corresponds to the VIII-VIII site | part of FIG. It is a front view which shows the time of operation | movement with the head protection airbag apparatus of 2nd Embodiment, and a comparative example. It is sectional drawing which shows the time of the action | operation of 2nd Embodiment in order, and respond | corresponds to the XX site | part of FIG. It is a figure explaining manufacture of the airbag used for the head protection airbag device of a 3rd embodiment. It is sectional drawing of the airbag of 3rd Embodiment, and respond | corresponds to the XII-XII site | part of FIG. It is a front view which shows the time of the action | operation of the head protection airbag apparatus of 3rd Embodiment. It is a figure which shows the modification of the airbag of 1st Embodiment, and shows the state unfolded flatly.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the head protection airbag device S1 of the first embodiment includes an airbag 21, an inflator 16, an airbag cover 11, and the like. , And is configured. The airbag 21 is located on the upper edge WU side of the windows (side windows) W1 and W2 on the vehicle inner side of the vehicle V from the lower edge side of the front pillar portion FP, above the intermediate pillar portion CP, and to the rear pillar portion RP. It is folded and stored in the range up to the top.

  As shown in FIG. 1, the inflator 16 is inserted into a connection port 23 for allowing the inflation gas G in the airbag 21 to flow in as a substantially cylindrical cylinder type, and is connected to the airbag 21. The inflator 16 is held by a mounting bracket 17, and the mounting bracket 17 is fastened by a bolt 18, whereby the inflator 16 is below the roof panel lining 6 with respect to the inner panel 2 of the roof side rail portion RR near the upper portion of the intermediate pillar portion CP. Covered and fixed by the edge 6a. The inner panel 2 is a member on the body (vehicle body) 1 side of the vehicle V.

  Each mounting bracket 13 mounts and fixes each mounting portion 37 of the airbag 21 to the inner panel 2 by mounting bolts 14 (see FIG. 10). Each mounting bolt 14 is fastened to a screw hole 3 a provided with a nut or the like in each mounting seat 3 of the inner panel 2.

  As shown in FIG. 1, the airbag cover 11 includes a lower edge 5a side of the front pillar garnish 5 disposed in the front pillar portion FP and a lower edge 6a side of the roof head lining 6 disposed in the roof side rail portion RR. And is composed of.

  As shown in FIGS. 1 and 5, the airbag 21 is inflated from the inflator 16 and expanded from a folded state, and is a vehicle having windows W 1 and W 2, an intermediate pillar CP, and a rear pillar RP. Expands and expands to cover the inside. As shown in FIGS. 2 and 3, the airbag 21 includes a gas inflow portion 22 that inflates to inflate an inflating gas G and separates the inboard side wall portion 22 a and the inboard side wall portion 22 b, and the inboard side wall portion. The non-inflatable portion 31 that does not allow the inflating gas G to flow in is in a state in which the 22a and the vehicle outer side wall portion 22b are combined. The airbag 21 is manufactured by bag weaving from yarns such as polyamide and polyester except for the vicinity of the attachment portion 37 (37A) on the front end side.

  The gas inflow portion 22 includes a connection port portion 23, a gas supply path portion 24, a front expansion portion 26, and a rear expansion portion 28. The connection port portion 23 extends upward from an intermediate portion in the front-rear direction on the upper edge 21 a side of the airbag 21 and is connected to the inflator 16 so that the inflation gas G from the inflator 16 flows into the gas inflow portion 22. Is done. The gas supply path portion 24 communicates with the connection port portion 23 and is disposed along the front-rear direction near the center of the upper edge 21 a side of the airbag 21 along the front-rear direction. It arrange | positions so that both may be connected between.

  The front inflating portion 26 covers the vehicle inner side of the front seat window W1 of the vehicle V and the intermediate pillar portion CP, and the rear inflating portion 28 is a vehicle between the rear seat window W2 and the rear pillar portion RP of the vehicle V. It is arranged so as to cover the inside. The front expansion part 26 communicates the rear upper end with the front end of the gas supply path part 24, and the rear expansion part 28 communicates the front upper end with the rear end of the gas supply path part 24.

  A rectifying cloth (not shown) that is inserted into the front end of the gas supply path portion 24 and branches the expansion gas G from the inflator 16 in the front and rear sides is provided in the connection port portion 23. Then, the inflation gas G of the inflator 16 is branched by the rectifying cloth through the connection port portion 23, the inflation gas G flowing to the front side flows into the front side inflation portion 26, and the inflation gas G flowing to the rear side is Then, the gas flows into the rear inflating portion 28 through the gas supply passage 24, and the front inflating portion 26 and the rear inflating portion 28 are inflated, respectively.

  The front expansion part 26 includes a main body cell part 26a that is largely disposed at the center in the front-rear direction, a vertical cell part 26b that is disposed along the vertical direction at the front end, and an extruded cell part 26c that protrudes forward at the front end upper part. And an inverted U-shaped pressure regulating cell portion 26d communicating with the lower end of the rear edge of the main body cell portion 26a. The extrusion cell portion 26c is for quickly pushing and opening the upper end side of the front pillar garnish 5 of the front pillar portion FP so that the vicinity of the front end of the airbag 21 is smoothly deployed downward. The pressure regulating cell portion 26d is squeezed from the main body cell portion 26a so as to be inflated later than the main body cell portion 26a, and when the internal pressure of the airbag 21 is increased when the passenger is received by the main body cell portion 26a or the like. The expansion gas G is caused to flow from the main body cell portion 26a so as to suppress a sudden increase in internal pressure.

  The rear inflating portion 28 constitutes an end portion in the front-rear direction of the airbag 21, that is, an end side inflating portion on the rear end side. The rear inflating portion 28 extends rearward from the rear end of the gas supply passage portion 24 and a substantially rectangular main body cell portion 28a on the lower side of the rear end, a vertical cell portion 28b disposed in the vertical direction at the front end. The extrusion cell part 28c arrange | positioned by this is comprised. The extruding cell portion 28c is for quickly pushing and opening the portion 6au above the rear pillar portion RP at the lower edge 6a of the roof head lining 6 as the airbag cover 11, and is folded by the quick pushing and opening of this portion 6au. The main body cell portion 28 a can be smoothly deployed inside the rear pillar garnish 9.

  The non-inflatable portion 31 of the airbag 21 includes a peripheral edge portion 32, a mounting portion 37, and a closing portion 39. The peripheral edge portion 32 is formed so as to surround the periphery of the gas inflow portion 22. The upper edge 33 of the peripheral edge 32 is formed with a substantially rectangular recess 32a on the rear end side, and the end-side upper edge portion 33b on the rear end side is stepped more than the front center-side upper edge portion 33a. It is formed to be lowered.

  The closing part 39 includes linear closing parts 39a, 39b, 39c, 39d and a plate-like closing part 39e. The plate-like closing portion 39e is formed in a substantially rectangular plate shape so as to extend upward from the lower edge 34 side of the peripheral edge portion 32 to the gas supply path portion 24, and partitions the front-side expansion portion 26 and the rear-side expansion portion 28. The linear closing part 39a is disposed in the front expansion part 26, extends upward from the lower edge 34 of the peripheral part 32, and divides the vertical cell part 26b and the main body cell part 26a of the front expansion part 26 into a linear shape. The closing part 39c extends upward from the lower edge 34 side of the peripheral edge part 32 so as to partition the inside of the pressure regulating cell part 26d. The linear closing part 39b extends forward from the upper end of the plate-like closing part 39e and is lowered so as to partition the main body cell part 26a and the pressure regulating cell part 26d. The linear closing portion 39d extends in an L-shape extending forward from the rear edge 35 of the peripheral edge portion 32 and falling downward to partition the extruded cell portion 28c and the main body cell portion 28a, and further to the vertical cell portion 28b. The main body cell portion 28a is disposed so as to partition.

  A plurality of attachment portions 37 (six in the embodiment) are formed so as to protrude upward from the peripheral edge portion 32 on the upper edge 21 a side of the airbag 21. Each mounting portion 37 is formed with a mounting hole 37a through which the mounting bolt 14 (see FIG. 10) is inserted. As described above, the mounting bracket 13 for mounting to the inner panel 2 on the body 1 side is fixed to each mounting portion 37, and the mounting bolts 14 inserted through the mounting holes 37 a are screwed to the mounting seats 3. Each attachment portion 37 is fixed to each attachment seat 3 of the inner panel 2 by being fastened to the hole 3a.

  In addition, as described above, the attachment portion 37A at the front end is formed by sewing a separate cloth material formed from a woven fabric such as polyamide to the portion formed by the bag weaving of the airbag 21. Has been. The mounting portion 37A constitutes a tension generating mounting portion that exerts tension along the front-rear direction on the lower edge 21b side of the airbag 21 when inflation is completed, and is fixed near the lower portion of the front pillar portion FP. When the airbag 21 is completely inflated, strong tension is exerted on the lower edge 21b side of the airbag 21, specifically on the line connecting the attachment portion 37A and the attachment portion 37 (37F) away from the front pillar portion FP. The air bag 21 is configured so as to improve the restraint of the occupant on the cabin side.

  The rear-end-side mounting portion 37 (37F) protrudes upward from an end-side upper edge portion 33b that is lowered by providing a step from the center-side upper edge portion 33a. It is disposed below the adjacent mounting portion 37E adjacent on the front side by a drop dimension DL, and when the airbag 21 is completely inflated, the end edge side of the end side inflating portion 28, that is, the rear edge 29 side is upward. The lifting attachment portion 37F has a function of pulling up.

  In addition, in each mounting seat 3 of the inner panel 2 on the body 1 side of the vehicle V, the mounting seat 3E for mounting the adjacent mounting portion 37E and the mounting seat 3F for mounting the lifting mounting portion 37F are arranged at substantially the same height. (See FIG. 1).

  In mounting the head protection airbag device S1 of the first embodiment on the vehicle V, first, the lower edge 21b side of the airbag 21 that is flatly deployed is brought closer to the upper edge 21a side where the attachment portion 37 is provided. Then, the airbag 21 is wound with a wrapping material (not shown) that can be broken to prevent it from collapsing.

  As shown in FIG. 4, the airbag 21 is folded at the upper edge 21a of the airbag 21 including the gas supply passage portion 24 as a bellows folding portion 42 for folding the bellows, and the area below the roll is rolled. It is folded as the roll folding part 43 to be folded. In the vicinity of the end side upper edge portion 33b, the pulling attachment portion 37F is lower than the adjacent attachment portion 37E (for the drop dimension DL), so the number of bellows folds is reduced compared to the center side upper edge portion 33a and the like. Yes.

  Then, after the airbag 21 is folded, the inflator 16 to which the attachment bracket 17 is attached is connected to the connection port portion 23 of the airbag 21, and the attachment bracket 13 is attached to each attachment portion 37 of the airbag 21. As shown in FIG. 4, an airbag assembly 41 can be formed.

  Thereafter, each mounting portion 37 to which the mounting bracket 13 is assembled is disposed on the corresponding mounting seat 3 of the inner panel 2 on the body 1 side, and is inserted into each mounting hole 37a. The air bag assembly 41 is attached to the body 1 by being fastened to the screw hole 3a, and further fixing the mounting bracket 17 to the bolt 18 and fixing the inflator 16 to the inner panel 2. Next, lead wires (not shown) extending from the control device for operating the predetermined inflator are connected to the inflator 16, the front pillar garnish 5 and the roof head lining 6 are attached to the body 1, and the intermediate pillar garnish 8 and the rear pillar garnish 9 are further attached. If attached to the body 1, the head protection airbag device S1 can be mounted on the vehicle V.

  If the inflator 16 is actuated after the head protection airbag device S1 of the first embodiment is mounted on the vehicle V, the inflation gas G from the inflator 16 becomes air as shown by the two-dot chain line in FIG. The airbag 21 flows into the gas supply passage 24 from the connection port 23 in the bag 21 and flows into the front inflatable portion 26 and the rear inflatable portion 28 of the airbag 21. Is further broken, and the airbag cover 11 on the lower edge 5a, 6a side of the front pillar garnish 5 and the roof head lining 6 is pushed open to protrude downward, as shown by a two-dot chain line in FIG. 1 and A in FIG. As described above, the windows W1 and W2, the intermediate pillar portion CP, and the rear pillar portion RP are greatly expanded and expanded so as to cover the inside of the vehicle.

  In the head protection airbag device S1 according to the embodiment, the pull-up attachment portion 37F on the rear end side of the airbag 21 raises the rear edge 29 of the rear inflation portion 28 of the airbag 21 upward, The forward movement of the side inflating portion 28 on the center side in the front-rear direction of the airbag 21 can be suppressed, a large area can be secured, and the rear inflating portion 28 can receive and protect the head of the passenger in the rear seat. .

  The pulling force that raises the rear edge 29 side of the pulling attachment portion 37F upward is generated as follows. That is, first, a mounting line LN (see FIG. 1) in which the mounting seats 3 (3A, 3B, 3C, 3D, 3E, 3F) on the body 1 side for mounting the entire mounting portion 37 are arranged side by side, and air The bag 21 is compared with a state where the bag 21 is not expanded and is flattened. The attachment line LN is represented by a line connecting the attachment seats 3 on the upper edge WU side of the windows W1 and W2, as shown in FIG.

  However, this attachment line LN is actually three-dimensionally bent corresponding to the inner panel 2 on the body 1 side of the vehicle V, and in order to correspond to the airbag 21 that is flatly deployed, It is necessary to convert the three-dimensional attachment line LN into a deployment attachment line LM that is two-dimensionally developed on a vertical plane along the front-rear direction. The deployment attachment line LM includes a horizontal line LM2 extending in the front-rear direction corresponding to the lower edge 6a side of the roof head lining 6 and a lower edge 5a of the front pillar garnish 5 in substantially the same manner as the arrangement of the airbag cover 11. Corresponding to the side, an oblique line LM1 extending forward in the obliquely downward direction from the front end of the horizontal line LM2 is provided.

  If each mounting portion 37 of the airbag 21 that is flatly deployed is normally disposed on the deployment mounting line LM, the airbag 21 is secured by bolting each mounting portion 37 to each mounting seat 3. It can be mounted on the vehicle V.

  However, in the case of the embodiment, the mounting portions 37A, 37B, 37C, 37D, and 37E excluding the pulling mounting portion 37F are arranged on the mounting seats 3A, 3B, 3C, 3D, and 3E corresponding to the deployment mounting line LM. When the rear inflatable portion 28 is deployed flat in a non-expanded state while being arranged at the positions 3AP, 3BP, 3CP, 3DP, 3EP, the pulling attachment portion 37F is as shown in FIG. , It is disposed below the position 3FP of the mounting seat 3F for mounting the lifting mounting portion 37F on the horizontal line LM2. This is because the lifting attachment portion 37F itself is arranged at the end side upper edge portion 33b located below the central upper edge portion 33a where the adjacent attachment portion 37E is arranged, and the adjacent attachment portion 37E has a drop dimension DL. It is arranged below. This is because the mounting seat 3F itself on the body 1 side of the vehicle V has the same height as the adjacent mounting seat 3E on the front side, as can be seen from FIG.

  Therefore, the lifting mounting portion 37F positioned below the adjacent mounting portion 37E is mounted on the mounting seat 3F of the inner panel 2 along the horizontal line LM2 so that the height thereof is substantially matched with the adjacent mounting portion 37E. For example, when the subsequent inflation is completed, the rear side inflation is larger than the airbag 210 (see B in FIG. 5) having no drop dimension DL corresponding to the vertical drop dimension DL between the adjacent attachment part 37E and the pulling attachment part 37F. The rear edge 29 of the portion 28 can be greatly raised upward.

  The airbag 210 is not provided with the drop dimension DL, and is disposed at the same height as the adjacent mounting portion 37E with the lifting mounting portion 37F as the end mounting portion 47. Are different and are connected to the inflator 16 by the same folding, and are mounted on the vehicle V as in the embodiment.

  As described above, in the first embodiment, the mounting portions 37 other than the pulling mounting portion 37F in the airbag 21 are disposed at the corresponding mounting positions 3AP, 3BP, 3CP, 3DP on the deployment mounting line LM. , 3EP, when the end-side inflating portion 28 is deployed in a non-inflated flat state, the pull-up mounting portion 37F of the airbag 21 is attached to the mounting seat on the lateral line LM2 of the deployment mounting line LM. From the arrangement position 3FP of 3F, a drop dimension DL is generated and arranged below in the vertical direction (vertical direction). That is, the pull-up mounting portion 37F is disposed below the position DL of the corresponding mounting seat 3F on the horizontal line LM2 by the drop dimension DL, so that the airbag 21 is completely inflated when mounted on the vehicle. Then, as shown in A of FIG. 5, the pulling attachment portion 37 </ b> F causes the upward tensile force T to act on the rear edge 29 side of the rear inflating portion 28, on the contrary, by the drop dimension DL. As a result, the rear inflatable portion 28 is pulled upward so that the airbag 21 is centered on the adjacent attachment portion 37E on the center side of the airbag 21 adjacent to the pull-up attachment portion 37F. The movement of the airbag 21 toward the center side (front side) of the rear edge 21c of the vehicle 21 is suppressed.

  Such an action causes the pull-up mounting portion 37F on the rear end side of the airbag 21 to be simply based on the arrangement position 3FP of the corresponding mounting seat 3F on the deployment mounting line LM formed by connecting the mounting seats 3 to each other. Since it can be achieved simply by placing the head at a drop dimension DL, it can be simply configured.

  Moreover, in head protection airbag apparatus S1 of 1st Embodiment, linear distance SL (refer FIG. 2) between the attaching part 37F for raising and the adjacent attaching part 37E of the center side direction of the adjacent airbag 21 is as follows. The pulling attachment portion 37F is disposed lower than the separation distance (mounting span) FS (see FIGS. 1 and 2) between the corresponding mounting seats 3E and 3F on the horizontal line LM2 (between the arrangement positions 3EP and 3FP). Minutes, longer. Therefore, when the airbag 21 is mounted on the vehicle V by folding the lower edge 21b side of the airbag 21 closer to the upper edge 21a side, the pull-up attachment portion 37F is adjacent to the adjacent attachment portion 37E. Has a margin for generating a slight slack on the upper edge 33 side of the peripheral edge 32 itself. This margin can absorb the contraction of the end 29 of the rear inflatable portion 28 in the direction toward the air bag center side (front) when the inflating is completed. 21 can also prevent the rear edge 21c side of the airbag 21 from moving to the center side (front side) in the front-rear direction when inflation is completed.

  Therefore, in head protection airbag device S1 of a 1st embodiment, it can control that rear edge 21c side of airbag 21 moves to the front side used as the center side of the front-back direction at the time of completion of inflation by simple structure.

  Further, in the head protection airbag device S1 of the first embodiment, a connecting belt or tether that attaches a tip to a rear edge 21c of the airbag 21 at a portion on the body 1 side that is separated from the airbag 21 along the front-rear direction. It is possible to prevent shrinkage of the area of the rear inflating portion 28 without separately providing a connecting material such as. Therefore, in the head protection airbag device S1 of the embodiment, for example, a vehicle in which a back door and a back panel are disposed close to a vehicle having no space on the body 1 side on the rear edge 21c side of the airbag 21. It can be suitably mounted.

  Further, in the first embodiment, the airbag 21 is a center in which the adjacent attachment portion 37E adjacent to the pulling attachment portion 37F is disposed in a state where the rear inflatable portion 28 is deployed in a non-inflated flat state. Compared with the side upper edge part 33a, the end side upper edge part 33b in which the pulling attachment part 37F is arranged is moved downward to the upper edge 21a of the rear side inflation part 28 of the airbag 21 so as to be offset downward. A recessed portion 32a to be inserted is provided, and a pulling attachment portion 37 is disposed at 33b on the upper edge portion of the peripheral edge of the recessed portion 32a.

  In such a configuration, the air bag 21 is lifted by shifting downward from the adjacent attachment portion 37E adjacent in the center side direction by the drop dimension DL so as to provide a step on the upper edge 33 side of the peripheral edge portion 32. If the mounting portion 37F is disposed, the airbag 21 can be formed, and the airbag device S1 can be configured more simply.

  Of course, the pull-up attachment portion on the end portion side in the front-rear direction of the airbag is not disposed so as to protrude upward from the upper edge of the airbag itself, as in the first embodiment, but on the end side of the airbag. You may provide so that it may overlap with an expansion part in a vehicle width direction.

  In the airbag 21A of the head protection airbag device S2 of the second embodiment shown in FIGS. 6 to 10, the pull-up mounting portion 37F and the rear inflating portion 28 serving as an inflating portion on the end side in the front-rear direction and the vehicle width direction So as to overlap each other. Specifically, a pulling attachment portion 37 </ b> F is disposed on the vehicle outer side O of the extrusion cell portion 28 c at the upper end of the rear side expansion portion 28. In the airbag 21A, the extruded cell portion 28c is disposed so as to extend to the rear edge 21c of the airbag 21A.

  And also in this airbag 21A, with respect to the deployment mounting line LM in which the mounting seats 3 on the body 1 side are arranged side by side, the mounting portion 37 excluding the lifting mounting portion 37F corresponds to the deployment mounting line LM. When the rear inflating portion 28 is deployed flat in a non-expanded state while being disposed at the position where each mounting seat 3 is disposed, the lifting mounting portion 37F is positioned on the horizontal line LM2 of the unfolding mounting line LM. Is arranged below the drop dimension DL from the arrangement position 3FP of the mounting seat 3F for the lifting mounting portion 37F.

  Therefore, in the second embodiment, as in the first embodiment, if the airbag 21A is folded, the mounting bracket 13 and the inflator 16 are mounted, mounted on the vehicle V, and deployed and inflated, the A in FIG. As shown in the drawing, the pull-up mounting portion 37F is disposed lower than the position 3FP of the corresponding mounting seat 3F by the drop dimension DL. Compared with the airbag 211 (see B in FIG. 9) in which the mounting portion 47 is provided without providing the drop dimension DL, the rear edge 29 side can be raised upward, and the same action as in the first embodiment.・ Effects can be obtained.

  Furthermore, in the second embodiment, the pulling attachment portion 37F of the airbag 21A can be overlapped with the extruded cell portion 28c on the upper end side of the rear inflating portion 28 in the vehicle width direction, and the attachment seat 3F of the pulling attachment portion 37F can be obtained. The vicinity can be covered with the expanded portion (extrusion cell portion) 28c (see A in FIG. 9 and B in FIG. 10), and the occupant head entering the roof side above the rear pillar portion RP from the vicinity of the mounting seat 3F The width dimension WL in the vertical direction for receiving the occupant's head can be secured so as to extend upward.

  In the second embodiment, when the airbag 21A is folded, the extruded cell portion 28c may be accordion-folded like the other gas supply passage portions 24 and the like as shown in FIG. 10A.

  In the second embodiment, the pulling attachment portion 37F is joined to the linear closing portion 39d between the main body cell portion 28a and the extrusion cell portion 28c by sewing or the like, and the extrusion cell portion of the rear expansion portion 28 is connected. It was arranged on the vehicle outer side O of 28c (see FIG. 8). However, the lifting attachment portion 37F may be disposed so as to overlap the rear side expansion portion 28 on the vehicle inner side I in the vehicle width direction.

  In the head protecting airbag device S3 of the third embodiment, as shown in FIGS. 11 to 13, the airbag 21 </ b> B is a lifting attachment portion 37 </ b> F in which the airbag 21 </ b> B is disposed above the rear inflation portion 28 and the rear inflation portion 28. The peripheral edge portion 32 as a non-expandable portion 31 that does not allow the inflating gas G to flow in is disposed so as to surround the rear inflatable portion 28.

  Further, the peripheral edge portion 32 is formed by providing a contraction portion 45 that is coupled directly with a reduced size in the vertical direction immediately below the pulling attachment portion 37F. As shown in FIG. 11 and FIG. 12A, the contraction portion 45 is provided with a cut portion 44 for cutting a triangular portion on the rear edge 21c of the airbag material 20, and the upper and lower edges 45b, 45c can be joined together by stitching, etc., as shown in FIG. 12B, a triangular portion can be picked and a tack 45a can be provided, and the combined edges 45b and 45c can be joined together by stitching, etc. As shown in FIG. 12C, the picked portion is cut and formed.

  Also in the airbag 21B, by providing the contraction portion 45, the pulling attachment portion 37F is lowered from the attachment portion 47 at the initial position. That is, also in the airbag 21B, the mounting portion 37 excluding the lifting mounting portion 37F corresponds to the deployment mounting line LM with respect to the deployment mounting line LM in which the mounting seats 3 on the body 1 side are arranged side by side. When the rear inflating portion 28 is deployed flat in a non-expanded state while being disposed at the position where each mounting seat 3 is disposed, the lifting mounting portion 37F is positioned on the horizontal line LM2 of the unfolding mounting line LM. Is arranged below the drop dimension DL from the arrangement position 3FP of the attachment seat 3F for the lifting attachment portion 37F.

  Therefore, in the third embodiment, as in the first and second embodiments, if the airbag 21B is folded, the mounting bracket 13 and the inflator 16 are mounted, mounted on the vehicle V, and deployed and inflated, the lifting mounting is performed. Since the portion 37F is disposed lower than the arrangement position 3FP of the mounting seat 3F on the unfolding mounting line LM by the head dimension DL, if the section 37F is deployed and inflated in a vehicle-mounted state, the head dimension DL is decreased. Compared to an airbag in which the mounting portion 47 is provided without providing the dimension DL, the rear edge 29 side can be raised upward, and the same actions and effects as in the first embodiment can be obtained.

  Furthermore, in the third embodiment, by providing the contraction portion 45, the pulling attachment portion 47F can be easily lowered to approach the rear side expansion portion 28. That is, for example, at the beginning of manufacturing the airbag 21B, first, the airbag is manufactured by arranging the mounting portions 37 so as to correspond to the layout positions of the mounting seats 3 on the deployment mounting line LM, and for lifting. If the cut portion 44 is provided at the peripheral portion 32 directly below the attachment portion 37F and the peripheral portions 45b and 45c of the cut portion 44 are coupled to each other, or the tack 45a is provided and the contraction portion 45 is provided, a predetermined attachment seat The airbag 21B can be easily manufactured by arranging the pulling attachment portion 37F at a position lowered by the drop dimension DL from the arrangement position 3FP of 3F.

  Further, in such a configuration, the arrangement position of the vertical lifting attachment portion 37 </ b> F can be easily adjusted by increasing / decreasing the vertical shrinkage by the contraction portion 45, and the rear edge of the rear expansion portion 28 can be adjusted. The upward tensile force toward the 29 side can be easily adjusted.

  In addition, if the drop dimension DL of the pulling attachment portion 37F is too small, it is difficult to exert a tensile force. If it is too large, the lower edge of the end-side expansion portion is raised to raise the protective area. Since it narrows, it is desirable to set it as 5-150 mm, desirably 50-100 mm.

  In each of the embodiments, the lifting attachment portion 37F has been described as the attachment portion disposed at the rearmost end in the front-rear direction of the airbags 21, 21A, 21B. However, the airbag is reversed in the front-rear direction. If it is set as this structure, what is necessary is just to comprise the attaching part used as the foremost end of an airbag as a pulling-up attaching part which makes upward tensile force act on the front edge side of a front side expansion part.

  Moreover, in the airbags 21, 21A, and 21B of the respective embodiments, the case where one pulling attachment portion 37F is disposed is shown. However, the mounting portion itself adjacent to the pulling mounting portion on the edge side may be disposed below the mounting position of the corresponding mounting seat on the deployment mounting line with a drop size. For example, like the airbag 21C shown in FIG. 14, the pulling attachment portion 37G, which is the end (rear end), is a drop size from the arrangement position 3GP of the corresponding attachment seat 3G on the deployment attachment line (lateral line) LM2. While lowering by DL1, the attachment portion 37F adjacent in front thereof may also be arranged so as to be lowered by the drop dimension DL2 from the arrangement position 3FP of the corresponding attachment seat 3F on the deployment attachment line (lateral line) LM2. That is, a plurality of pulling attachment portions 37F and 37G may be provided on the edge side of the airbag 21. When a plurality of lifting attachment portions 37F and 37G are provided, the drop dimensions DL1 and DL2 with respect to the placement positions 3FP and 3GP of the corresponding attachment seats 3F and 3G are smoothly pulled upward toward the edge 29 of the airbag 21C. In order to be able to apply a force, it is desirable to reduce the size of the airbag 21C toward the center in the front-rear direction.

1 ... (Body) Body,
3 (3A, 3B, 3C, 3D, 3E, 3F, 3G) ... mounting seat,
3AP, 3BP, 3CP, 3DP, 3EP, 3FP, 3GP ... (for the corresponding mounting seat on the deployment mounting line)
21, 21A, 21B, 21C ... airbags,
21a, 33 ... upper edge,
21b, 34 ... lower edge,
22: Gas inflow part,
22a ... the inner wall of the vehicle,
22b ... the outer wall of the vehicle,
28 ... (end-side inflatable portion) rear-side inflatable portion,
29 ... (the edge of the end-side expansion part) the rear edge,
31 ... non-inflatable part,
32 ... peripheral part,
37 (37A, 37B, 37C, 37D, 37E) ... mounting portion,
37F, 37G ... Lifting attachment part,
45 ... contraction part,
LN ... Mounting line,
LM ... Deployment mounting line,
V ... Vehicle,
W1, W2 ... windows,
G ... expansion gas,
S1, S2, S3... Head protection airbag device.

Claims (4)

Airbag
At the time of inflow of the expansion gas, so as to cover the vehicle interior of the vehicle window, and expand and expand downward from the upper edge side of the window,
Fold the lower edge side of the flat deployed state closer to the upper edge side, and attach a plurality of mounting parts arranged side by side in the front-rear direction to the corresponding mounting seats on the vehicle body side. Stored on the upper edge,
A head constructed by disposing an inflatable end side inflating portion at the end in the front-rear direction so as to protect the passenger's head so that the inflating gas flows and separates the vehicle inner wall portion and the vehicle outer wall portion. Part protection airbag device,
Among the plurality of mounting portions, the mounting portion disposed on the end side of the airbag is,
While being disposed on the upper side of the end side expansion portion,
An upward tensile force is applied to the edge side of the rear inflatable portion so that movement of the end inflatable portion toward the center in the front-rear direction of the airbag at the time of completion of inflation in the vehicle mounted state can be suppressed. As a lifting attachment,
A mounting line connecting the mounting seats, the mounting part excluding the lifting mounting part with respect to a deployment mounting line developed on a vertical plane along the front-rear direction while maintaining a height. , When the end-side expansion portion is deployed in a non-inflated flat state while being arranged at the corresponding placement positions of the mounting seats on the deployment attachment line,
In order to be disposed below the mounting position of the mounting seat for mounting the lifting mounting portion on the deployment mounting line,
A head protection airbag device, characterized in that it is disposed. The airbag is
Compared with the upper edge portion where the attachment portion adjacent to the pulling attachment portion in the center side direction is arranged in the state where the end-side inflation portion is deployed in a non-inflated flat state. In order to offset the upper edge portion where the lifting attachment portion is disposed downward,
On the upper edge of the end side inflating portion of the airbag, a concave portion is provided to be lowered,
On the upper edge side of the peripheral edge of the recess, the lifting attachment is disposed,
The head protection airbag device according to claim 1, wherein the head protection airbag device is configured.   The pull-up attachment portion of the airbag is disposed so as to overlap the end-side inflated portion when the end portion of the airbag including the end-side inflated portion is unflattened flatly. The head protecting airbag device according to claim 1, wherein the head protecting airbag device is provided. The airbag surrounds the periphery of the end-side inflating portion between the end-side inflating portion and the pull-up mounting portion disposed above the end-side inflating portion, and does not allow the inflating gas to flow in. It is configured by arranging the peripheral part as a non-inflatable part,
2. The head protection airbag according to claim 1, wherein the peripheral edge portion is formed by providing a contraction portion in which a size in a vertical direction is reduced and combined immediately below the pulling attachment portion. apparatus.

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